diff --git a/HowTo-Cross-Compile.md b/HowTo-Cross-Compile.md
index faa1dae..0f2d7d4 100644
--- a/HowTo-Cross-Compile.md
+++ b/HowTo-Cross-Compile.md
@@ -2,7 +2,7 @@
 
 This manual explains the steps to prepare a basic cross compiling environment on Debian. The build will be installed to `/opt/W64-cross-compile`. If the destination folder is set up right, you do not need any root rights.
 
-The following packages are needed:
+The following packages are needed: (maybe wine is not anymore needed, haven't tested yet)
 - wine
 - wine64
 - mingw-w64
@@ -61,12 +61,11 @@ Because not all compiled `*.dll` files are installed into the destination we nee
 
 ## atk
 
-Edit the `meson_options.txt` file and disable the building of the introspection files.
-Compile the library using the following steps.
+The flags -Dintrospection=false will tell meson to disable some building options. See the file `meson_options.txt` for some information. Compile the library using the following steps.
 
 	mkdir build
 	cd build
-	PKG_CONFIG_PATH=/opt/W64-cross-compile/lib/pkgconfig meson --buildtype=release --prefix=/opt/W64-cross-compile/ --cross-file ../../cross-file.ini
+	PKG_CONFIG_PATH=/opt/W64-cross-compile/lib/pkgconfig meson --buildtype=release -Dintrospection=false -Ddocs=false --prefix=/opt/W64-cross-compile/ --cross-file ../../cross-file.ini
 	meson compile
 	meson install
 
@@ -107,7 +106,21 @@ In case of an error with unresolved symbols like undefined reference to '__strca
 	cp `find -name "*.dll"` /opt/W64-cross-compile/lib/
 
 
-## GTK
+## GTK+-4
+
+### Configuration and Compilation of GTK
+
+	mkdir build
+	cd build
+	PKG_CONFIG_PATH=/opt/W64-cross-compile/lib/pkgconfig meson --buildtype=release --prefix=/opt/W64-cross-compile/ -Dmedia-gstreamer=disabled -Ddemos=false -Dbuild-examples=false -Dbuild-tests=false --cross-file ../../cross-file.ini
+	meson compile
+
+If the compile process stops with error `../gdk/loaders/gdkjpeg.c:302:67: error: ‘free’ undeclared (first use in this function)` you need to add the line `#include <stdlib.h>`on top of the file, before the `#include <jpeglib.h>` line. Run the compile command again.
+
+	meson install
+	cp `find -name "*.dll"` /opt/W64-cross-compile/lib/
+
+## GTK+-3
 
 ### preparation beacuse of `wine`
 
@@ -115,10 +128,12 @@ Copy all compiled executeble and library files into the wine windows/system fold
 
 	cp /opt/W64-cross-compile/bin/*.exe ~/.wine/drive_c/windows/system32/
 	cp /opt/W64-cross-compile/lib/*.dll ~/.wine/drive_c/windows/system32/
+	cp /usr/x86_64-w64-mingw32/lib/zlib1.dll ~/.wine/drive_c/windows/system32/
+
 
 ### workaround for some issues
 
-edit the file `gdk/win32/gdkprivate-win32.h` and search around line 300 for the following declaration. The compiler is missing the **extern** statement here.
+Edit the file `gdk/win32/gdkprivate-win32.h` and search around line 300 for the following declaration. In some releases the compiler is missing the **extern** statement here.
 
 	300 /* The singleton selection object pointer */
 	301 extern GdkWin32Selection *_win32_selection;
@@ -128,8 +143,20 @@ edit the file `gdk/win32/gdkprivate-win32.h` and search around line 300 for the
 Configure and compile the library.
 
 	PKG_CONFIG_PATH=/opt/W64-cross-compile/lib/pkgconfig ./configure --prefix=/opt/W64-cross-compile/ --host=x86_64-w64-mingw32
+	touch gdk/win32/winpointer.h
 	PKG_CONFIG_PATH=/opt/W64-cross-compile/lib/pkgconfig make
-	make install
+
+#### Compile Error: `/opt/W64-cross-compile/bin/glib-compile-resources: Datei oder Verzeichnis nicht gefunden`
+
+	make[2]: Verzeichnis „/home/steffen/test/GTKCross/gtk+-3.24.1/gdk“ wird betreten
+	/bin/bash: Zeile 1: /opt/W64-cross-compile/bin/glib-compile-resources: Datei oder Verzeichnis nicht gefunden
+	GEN      gdkresources.h
+	/bin/bash: Zeile 1: /opt/W64-cross-compile/bin/glib-compile-resources: Datei oder Verzeichnis nicht gefunden
+	make[2]: *** [Makefile:2243: gdkresources.h] Fehler 127
+
+Edit the file `gdk/Makefile` append the windows `.exe` extension here.
+Find the `GLIB_COMPILE_RESOURCES` and add the wine command prior to all `$(GLIB_COMPILE_RESOURCES)` calls.
+Try to compile.
 
 ### fix and install the compilation